Dynamic fouling behaviors of submerged nonwoven bioreactor for filtration of activated sludge with different SRT

Shun Hsing Chuang, Po Kuen Lin, Wei Chin Chang

Research output: Contribution to journalArticlepeer-review

26 Scopus citations

Abstract

The flux variations and resistances accumulated during filtration of activated sludge with sludge retention time (SRT) of 15, 30, and 60. days were analyzed to investigate the dynamic fouling behavior in a submerged nonwoven bioreactor. Different SRT values varied sludge condition and particle size distribution in the supernatants, which caused dissimilar fouling characteristics. Short-term fouling of the nonwoven bioreactor during filtration of activated sludge with SRT of 15. days was fully reversible, and the resistance percentages of solutes, colloids, and suspended solids were 6%, 27%, and 67%, respectively. On the other hand, significant increases of colloid resistance, such as with the filtration of activated sludge with SRT of 30 and 60. days, were related to the occurrence of irreversible fouling. The phenomenon of pore blocking by particles or colloids with size analogous to the pore of nonwoven fabric was a decisive factor leading to irreversible fouling in the large-pore materials.

Original languageEnglish
Pages (from-to)7768-7776
Number of pages9
JournalBioresource Technology
Volume102
Issue number17
DOIs
StatePublished - Sep 2011

Keywords

  • Activated sludge
  • Irreversible fouling
  • Nonwoven bioreactor
  • Reversible fouling
  • Sludge retention time

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